Window-screen.



No. 875,961. PATENTED JAN. 7, 1908.

M. SOLMSON.

WINDOW SCREEN.

APPLICATION FILED MAR. 1, 1907.

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MOSES SOLMSON, OF BALTIMORE, MARYLAND.

WINDOW-SCREEN.

Specification of Letters Patent.

Patented Jan. '7, 1908.

Application filed March 1. 1907. Serial No. 359.964.

To all whom it may concern:

Be it known that I, Moses SOLMSON, a citizen of the United States ofAmerica, and resident of the city of Baltimore, State of Maryland, haveinvented certain new and useful Improvements in IVindow-Screens, ofwhich the following is a specification.

My invention relates to a window screen, and has for its purpose tosupply such a screen with a device having a doublefunction. First, togive to the screen a sullicient tension upon its guides to hold itfirmly in place at any position, and secondly, to give to the screencapacity for adjustment upon its guides so that its tension thereon willremain constant or can be adjusted to be constant notwithstandingshrinkage of the frame of the screen or of the window.

Heretofore it has been customary to provide one side of the screen witha bow spring for the purpose of producing tension upon the guides andthe other side of the screen With an independent positively. adjustableportion, by which the width of the screen could be independentlyadjusted I have combined these two devices in one, and I have providedthe ordinary bow tension spring with means for adjusting its stationaryend so that it may be placed upward against the guides as the screenshrinks or the window expands and the desired adjustment of sizeattained, while the uniformity of tension of the screen is retained.

In the drawings,-Figurc lrepresents a vertical section of my device asapplied to the side of a window frame. Fig. 2 represents a window framewith a screen frame in place.

Referring to the figures-l is a window frame having guides l -2 uponexterior opposite vertical sides.

3 is a frame designed to carry the screen. having a shallow groove onone side engaging the guide 2, and on the other side a deep groove inwhich is mounted the necessary tension spring, as shown in Fig. 1. Thedeep groove in F 1 is marked 4.

5 is the usual form of how spring having a grooved surface at the centerof its bow which fits upon and rides upon the guide 2 6 is a screw,threaded through the side of the frame 3 and having a slot upon itsinner end. Upon the outer end of the screw is a head 7 which passesthrough a hole in the end of the spring 5. The head is clenched downupon the spring in such a manner as to hold the spring firmly in placebut to permit the screw to turn. The operation of the device is simple.An adjustment of the screw 6 will force the end of the spring 5 in orout as the case may be and change the position of the bearing surface ofthe spring 5 in its relation to the guide 2*. Thus a shrinkage of theframe may be taken up and a uniform tension of the spring ahvaysmaintained.

Having thus described my invention, what I claim and desire to secure byLetters Patcut is:

1. In a window frame, the combination of a window screen having groovededges and adapted to fit upon and slide upon vertical guides in thewindow frame, a tension spring located in one of the grooves of thescreen combined with a screw swiveled to one end of the spring andtapped through the screen for adjustment of the spring from the interiorof r the screen without re moving it from the win (low.

2. In a Window frame, a combination of a window screen having groovededges, and adapted to fit upon and slide upon vertical guides in thewindow frame, the combination of a tension spring carried by the screenand bearing on the frame, and an adjusting means, one end of the springhaving a swivel connection with the adjusting means, and adapted to bemoved by it toward and from the frame to regulate the tension of thespring and the other end of which has a sliding hearing on a flatsurface on the screen.

3. In a window frame a combination of a window screen having groovededges, and adapted to fit and. slide upon vertical guides inv the windowframe, an adjusting screw, and a bow spring, one end of which rests on aflat surface on the screen, and the other end of which has a swivelengagement with the screw, and is adapted to be adjusted by it towardand from the frame, the back of the bow engaging the window frame tocreate friction between the screen and the frame, the amount of which isregulated by turning the screw.

Signed by me at Baltimore, Maryland, this Mth day of February, 1907.

MOSES SOLMSOV.

IVitnesses:

B. SCHROETER, JOHN EMORY (Moss.

